Alarm apparatus.



PATENTED DEC. 3, 1907.

L. W. PBNNINGTON.

ALARM APPARATUS.

APPLICATION FILED DEO.15, 190s.

Inu en. t or I tor! 5 A A orneg LAWRENCE W. PENNINGTON, OF WORCESTER. MASSACHUSETTS.

ALA APPARATUS.

Specification of latter Patent.

Patented Dec. 3, 1907.

Application filed December 15. 1906. Serial'lo. 291-940.

To all whom it may concern:

Be it known that LLawmmcn W. PEN- NINGTON, a citizen of the United States, re-

siding at W'orcester, in the county of Wort'es.v

ter and Commonwealth of Massachusetts, have invented a new and useful Improvement in an Alarm Apparatus, of which the following is a specification, accompanied by drawings forming a part of the same, in which Figure 1 represents a front view of my improved alarm ap ratus. Fig. 2 represents a front view wit the door 0 n to disclose the interior mechanism, an showing the gravity pan in its normal 'tion. Fig. 3 represents a front view wit the door open, but with the gravity an raised to set the alarm in action, and ig. 4 is a detached view of a portion of the framework supporting the gravity pan and showing the gravity an in a osltion between those shown in igs. 2 an 3 and at the beginning of the retarded movement of the gravity an.

Similar reference letters and to similar parts in the different views.

My resent invention relates to an apparatus, or producing either an audible or visual alarm u on the movement of one of its members w ich may be produced by the turning of a door-knob, the o ning of a window or door, or other desire means.

The operation of my ap aratus is designed to reduce either a visuaFor audible alarm, or oth, in the present instance ,by lighting a gas jet and by sounding a bell, with the light and the sound of the bell continued through a predetermined period, and my invention consists in the construction and arrangement of parts as hereinafter described and pointed out in the annexed claims.

The operative parts of my improved alarm apparatus are preferabl inclosed within a box or case 1, having a cor 2 hinged to one side. Upon the outside of the door 2 may be conveniently located an ordinary electric bell 3. Vithin the box or case I lace a battery 4, and upon a supporting amework 5 I mount a rocking gravity pan 6 arran ed to swing freely upon a rod or pintle 7, sai pan 6 being attached to and suspended beneath the rod 7, with the center of the pan slightl to one side of the rod 7, so that the pan wi I normally be tip ed and supported in the inclined position shown in F 2, with the end 8 of the an the lowest.

Passing upward through the box 1 is a gas ures refer pipe 9 connected at its lower end with the source of gas supply, and having mounted upon its upper end a burner 10. The gas pipe 9 is provided with a key 11 to which is attached a lever 12, having one end connected by a link 13 with the gravity pan 6, and having the opposite end connected to a pull rod or cord 14. The pull rod or cord 14 is connected at its opposite end with the rotating knob of a door, with a door itself or with a window, so that in case the door-knob is turned, the door is o ened, or the window is raised, the rod 14 wi be pulled downward in the direction of the arrow 15, thereby rocking the lever 12 from the position shown in Fig. 2 to that shown in Fig. 3. This movement of the lever 12 opens the key 11 and admits a su ply of gas to the burner 10. If, inthe norma position of the key 11 and lever 12, as shown in Fig. 2, the key be left partially o n so as to maintain a small flame 16, the roc ing movement of the key consequent upon pulling the rod 14 will at once produce a large flame 17, Fig. 3, thereby givmg a visual alarm.

The magnets of the electric bell 3 are connected in the usual manner with a wire 18 leading to one pole of the battery and with a wire 19 whose terminal 20 is, arranged in the path of a curved arm 21 carried by the lever 12. The curved arm 21 is connected with the other pole. of the battery through the gas pipe 9 and wire 22, said connection comprising a switch 23, preferably placed upon the outer side of the box or case 1. By rocking the lever 12 from the position in Fig. 2 to that shown in Fig. 3, the curved arm 21 is brought into contact with the terminal 20, thereb completing the circuit and bringing the bell 3 into action, thereby giving an audible alarm. I

In order to prevent the pan 6 from at once rocking from the position shown in Fig. 3 back to its normal position shown in Fig. 2 whenever the rod 14 is released, which would terminate both the visual and audible alarms, I provide the pan with an oblique artition 24, as shown in sectional view in if 4, said partition being united to the si es and bottom of the pan and extending the entire width of the pan, with a narrow space 25 between the top of the pan and the upper end of the artition. The partition 24 is also rovide at its lower end with a small opening 26. I place within the pan a small quantity of liquid, preferably alcohol,

- which in the normal position of the pan, as

- shown in Fig. 2, rests in the lower end 8 of the an, the lineof alcohol,being indicated by t e broken line 27. i

When the pan is rocked into the position shown'in Fig. 3 the alcohol flows over'the top of the partition 24, through the space 25 into the opposite end of the pan, as indicated by the bro en line 28. When the rod 14 is released a partially reverse movement of the pan takes place, bringing the end 8 slightly the lowest, as shown in Flg. 4, due to the pan being pivoted at one side of its center.

shown in Fig. 3 to that shown in Fig. 4, causes the alcohol to flow toward the end 8 of the pan and beneath the artition 24. slow movement of the alco ol throu h the small opening 26 now takes place al owing the alcohol to flow through the partition toward the end 8, thereby slowly changing its center of gravit and causing a gra ua rocking motion of t e pan-to take place, un-

til it is finally brought to its normal position as shown in Fig. 2.. During this slow reverse movement of the an 6 the flame of the gas jet is gradually rem uced in size and the terminal 20 sliding over the curved edge of This movement of the pan from the position the smallero whic the liqui seam va the center of avity and control the roc 'n movement 0 the pan, such a weight b,ein shown at 32.

Wlxat I claim as my invention and desire to secure by Letters Patent is 1. In an alarm apparatus, the combination with means for producing an audible alarm forming part of an electric circuit, of a swin ing lever, an arm carried by one end of saidever and curved concentrically with its axis of rotation, a contact point arranged in the path of said curved arm, said contact point and said arm forming the terminals of said electric circuit, a rocking pan connected with said arm and containing liquid, said pan provided with a partition having openings of difierent sizes through the larger of which the liquid passes when said lever is swung to complete the contact and through the smaller of which the liquid passes to rock the pan, thereby reversing the movement of said pan and its connecting swinging arm.

2. In an alarm apparatus, the combination with a gas burner, a ke forcontrolling the admission of gas to sai burner, a lever connected with said key, means for swinging said lever to open said key, and a rocking pan connected with said lever-and containing liquid, said pan provided with a partition having ofpenin s 0 different sizes through the larger 0 whic the liquid passes when the lever is swun to 0 en the keg, and through passes to rock the pan, thereb reversin the movementof said lever and c osing the iy.

LAWRENCE W. P NNINGTON.

Witnesses:

RUFUS B. FOWLER, PENELOPE COMBERBAOH. 

